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If you're looking for accurate measurements above ~4KHz
with the ECM8000, I've compared a few with an Earthworks
cal mic and they all had a few dB bump above 4KHz then back
down (and falloff) at 20KHz. The manufacturer typical curve
published shows the general shape, the peak amplitude just
seems to vary a bit, some more than others.

The ECM's can still be quite useful, just understand that it will
read a bit higher than "truth" in the highs.

Thanks grumpy,
I've been reading up all nite on the ECM800, REW and the DEQ at Home Theater Shack. Plan to use it for sub duty.
The confirmation email from MusiciansFriend listed the DEQ2496 as REFURB. Hope it's not too old. To me there is a distinct difference between B-stock and REFURB! Probably some discussion with them in the AM. Going out for the Persiod shower now.
Later

I have a standing rule, usually only repeated when someone tries to sell me an extended warranty, which is "If I have any trouble with this product I am never shopping here again!"
I learned my lesson from Fry's Electronics. Well known for selling defective, recalled merchandise and passing refurbs as new. I watched them put a new price tag on a recalled graphics card I just returned.
Never again.

Thanks, already have the RA. Without going into details let me just say that returning, exchanging anything is an enormous PITA for me no matter the supplier. Guitar Center had the same deal just harder to find on their website. At least they showed it as refurb. But how does a refurb fail the first time you plug it in?
On a good note, I won two tickets to Patty Griffin on the radio!

Well ... mine has not failed yet in the week that I have had it powered up, however I think I will leave it powered up for another week before I connect it up to my system ...... just to be sure....... I can't remember ever having done this before for ANY piece of audio gear. Is it just the DEQ2496 that seems to have a high failure rate or is it all of Bangringer's equipment ??

Is it just the DEQ2496 that seems to have a high failure rate or is it all of Bangringer's equipment ??

Their outboard dynamics gear is sonically inferior. Innards are cheap-o. They don't fail, so much, as just suck. I wish they would fail more often - then all the low-end clubs that deploy them would have to get something else, hopefully better!

I have seen many reports of this particular unit being failure prone. What it is trying to do is very complicated stuff, and I guess they slapped it together fast to get it to market, but missed some Q/A Q/C...